The changing biosphere: recent insights from paleoenvironmental science into drivers,mechanisms and impacts

Paleoenvironmental science has experienced a recent surge in interest and activity as concerns grow over global environmental change. Key research questions in the biotic realm of paleoenvironmental science focus on explaining climatic change at time scales of decades to centuries and understanding ecosystem responses to these changes. Biotic responses are increasingly being studied at smaller spatial scales to identify local factors that determine the sensitivity of a particular system to climatic change. These findings can then be applied to solving a variety of problems, such as setting conservation targets or testing mechanisms for observed climatic and biogeographic phenomena. Research approaches commonly used today include hypothesis testing, which has now become more sophisticated as paleoecologists and paleoclimatologists integrate with modellers. Other frameworks involve the quantitative integration of multiple proxy indicators and the use of extensive publicly available data networks to produce new datasets for paleoclimatic reconstructions and other applications.     

‘The debatable territory where geology and archaeology meet’: reassessing the early archaeobotanical work of Clement Reid and Arthur Lyell at Roman Silchester

The first large-scale archaeobotanical study in Britain, conducted from 1899 to 1909 by Clement Reid and Arthur Lyell at Silchester, provided the first evidence for the introduction of Roman plant foods to Britain, yet the findings have thus far remained unverified. This paper presents a reassessment of these archaeobotanical remains, now stored as part of the Silchester Collection in Reading Museum. The documentary evidence for the Silchester study is summarised, before the results are presented for over a 1000 plant remains including an assessment of preservation, identification and modern contamination. The dataset includes both evidence for the presence of nationally rare plant foods, such as medlar, and several archaeophytes. The methodologies and original interpretations of Reid and Lyell's study are reassessed in light of current archaeobotanical knowledge. Spatial and contextual patterns in the distribution of plant foods and ornamental taxa are also explored. Finally, the legacy of the study for the development of archaeobotany in the 20th century is evaluated.     

Infrastructures of environmental governance

To the extent that environmental governance aspires to be based on positive knowledge of what ‘the environment’ consists of and how it functions, programmes of environmental management must find ways to study it. This article draws on scholarship on knowledge infrastructures to examine a trajectory of scientific work in Ecuador focused on biodiversity and the recent uptake of this infrastructure for the study of climate change. When combined with an appreciation for the character of power and knowledge in modern institutions, analyses of experts’ ‘infrastructure work’ elucidate how environmental problems take shape as objects of expert intervention at the level of concrete, technical practices. Incorporating scientific infrastructure within the ambit of environmental anthropology can help us to understand the shape of environmental politics to come.     

Plant Diversity in the Archaeological Record: A Means Toward Defining Hunter–Gatherer Mobility Strategies

The diversity and ubiquity measures of archaeological macrobotanical remains can be utilized to help define mobility strategies of hunter–gatherers. Differences in the diversity and ubiquity of plant remains are predicted to occur between different types of sites utilized by hunter–gatherers. Such sites include base camps of residentially and logistically mobile groups, as well as special-purpose sites usually associated with logistically mobile groups. The focus upon the importance of strategies of mobility and plant use instead of the typological determination of plant taxa allows for the use of specimen types in such analyses when scientific identifications are difficult to make. Data from the archaeological site of San Jacinto 1, located in northern Colombia, are utilized to examine this relationship.     

Climate change and anthropology: The importance of reception studies (Respond to this article at http://www.therai.org.uk/at/debate)

Climate change anthropology to date has devoted itself primarily to ‘observation studies’: investigations of how communities perceive and respond to the local physical impacts of global warming. I argue for the utility, and necessity, of a complementary research programme in ‘reception studies’: investigations of how communities receive, interpret and adopt the global scientific discourse of climate change that is now spreading rapidly to even the most remote societies. Using the Marshall Islands as a case study, I demonstrate the powerful influence of this discourse on local views of environmental change, belying recent arguments that anthropologists wishing to access emic notions of climate change must exclude the influence of foreign scientific education from their analysis.     

Ecologically Sustainable Development in a ‘Quarry’ Economy: One Step Forward,Two Steps Back

An overview is presented of recent work on the environmental changes impacting on Australia and the policy responses of the State and Commonwealth governments, especially over the last ten years. This period has seen a remarkably stable phase of conservative government administration in Canberra and consistent resistance to a strong environmental policy agenda, both domestically and internationally. Attention is focused particularly on rural and regional Australia, rather than on urban areas. The paper discusses the role of environmental issues in recent elections and also details the results of relevant opinion polls charting changes in environmental attitudes. The problems posed by the federal system of administration are outlined as are recent analyses and counter‐analyses of the state of the Australian environment. A more fundamental problem with liberal democracy and environmental values is also addressed.     

Indigenous agriculture in the Americas

Significant advances in our understanding of ancient agricultural practices in the Americas have been made in recent years. This review of the literature focuses on studies published between 1987 and early 1994. Issues pertaining to the transition from foraging to farming include the habitability of the American tropics prior to the development of agriculture, theories on plant domestication and the origins of agriculture, regional syntheses of agricultural development, and the origin, evolution, and dissemination of domesticates in the Americas. Other topics reviewed include new techniques that have recently been applied to the study of prehistoric agriculture in the Americas, various approaches to the study of agricultural change, and ways in which research on ancient agricultural practices is being applied in modern experimental agriculture and rural development projects.     

Provenience,age and associations of archaic Homo sapiens crania from Lake Eyasi,Tanzania

Fifty years ago, an ethnographic expedition found primitive human fossils at Lake Eyasi, Tanzania. Subsequent emphasis has centered almost exclusively on cranial morphology, neglecting the discovery site and associated finds. Fauna has been deemed “essentially modern” and racemization dates suggest a late Pleistocene age for the hominid remains; these assessments have been advanced as consistent with a “terminal Middle Stone Age” antiquity. Based on recent observations at the site and new sediment analyses, a provisional sequence is now proposed: an earlier formation, the Eyasi Beds, is distinguished from later Pleistocene deposits, the Mumba Beds, the latter being partially calibrated by uranium series and radiocarbon dates. This evidence indicates that the Eyasi Beds, the probable source of the human fossils, are older than 130,000 years, and the fauna may include seven extinct large mammal species. Documented Eyasi Beds artifacts are mostly unspecialized Middle Stone Age types; no typological or technical features suggest later MSA specializations or innovations foreshadowing Later Stone Age industries. A series of core tools from the lakeshore suggests an industry of Sangoan aspect. All lines of evidence from the locality contradict the young amino acid racemization dates; artifacts and fauna, including archaic Homo sapiens remains, are of probable Middle Pleistocene age.     

Stable isotope analysis of prehistoric populations from the cemeteries of the Middle and Lower Dnieper Basin,Ukraine

This paper presents the results of new stable isotopes (carbon and nitrogen) analysis of human, faunal and fish remains from thirteen cemeteries from the Middle and Lower Dnieper Basin, Ukraine. The results are integrated with earlier analyses, undertaken solely on human samples, in order to provide a comprehensive overview of subsistence across the Upper Palaeolithic through to Eneolithic periods in this region. This is the first time that a combined sample of human, faunal and fish remains has been studied in order to interpret subsistence strategies across these periods in Ukraine. The total dataset comprises 113 samples of human, faunal and fish remains, 59 of which include new analyses of faunal and fish remains that have not previously been made available for study (Table 1). The analysis of the faunal and fish remains allows for a consideration of trophic levels which indicates that the consumption of freshwater fish occurs from the Epipalaeolithic period onwards. Whilst the majority of the cemeteries and the individuals therein cluster in relatively tight groups, there is a significant offset between the human and faunal samples due to the consumption of freshwater resources. The fish samples analysed in the study appear to exhibit a relatively random distribution when compared to the other samples analysed. In general, freshwater resources remain significant through until the end of the Neolithic period and into the Eneolithic period at the sites investigated.     

Stable isotope investigations of charred barley (Hordeum vulgare) and wheat (Triticum spelta) grains from Danebury Hillfort: implications for palaeodietary reconstructions

Palaeodietary studies typically focus on the analysis of bone collagen due to the limited availability of plant remains. Isotopic analysis of plant remains, however, allow for a more extensive consideration of the contribution of plants to the human diet and can potentially provide information about the environment in which the crops were grown. This paper reports the results of carbon and nitrogen isotope analyses performed on charred barley and wheat grains recovered from pits within Danebury Iron Age hillfort. To the best of our knowledge, this is the first Iron Age site in Britain from which charred grains have been isotopically analysed. Our results suggest that cereals found at the hillfort were grown in several different environmental contexts. The isotope data demonstrate that the herbivores were not consuming a diet primarily based on grains as the δ¹⁵N values of the grains are very similar to those of the herbivores. Palaeodietary investigations typically assume that humans eating plant protein only would have the same δ¹⁵N value as the local herbivores. This assumption is clearly invalid at Danebury, where the humans and animals appear to have consumed either different parts of the same plants or different plants. Researchers typically interpret high differences between human and animal δ¹⁵N values as indicative of diets high in animal protein, however where major plant resources have δ¹⁵N values similar to those of the herbivores our ability to distinguish between plant and animal sources of protein in the diet is limited. Our research has demonstrated that whenever possible it is desirable to measure the isotopic signatures of potential major plant resources in order to understand past subsistence strategies.     

Development and change in burgage plots: the example of Wells

More attention is now being paid to the analysis of medieval and early modern town plans. Current debates include the usefulness of nineteenth-century plans to recreate earlier patterns and the antiquity and durability of the so-called burgage plot. This piece uses the abundant documents which survive in Wells to illustrate the history of the properties of one town. Several cycles of change are identified giving a complex mixture of continuity and change in plot boundaries. The material is used to suggest a series of processes which can result in boundary changes. The findings are related to recent work elsewhere in England. The need for more research is stressed.     

GEOGRAPHIC CONCENTRATION AND ESTABLISHMENT SCALE: AN EXTENSION USING PANEL DATA*

ABSTRACT In a recent study, Holmes and Stevens (2002) identify for the first time the positive relationship that exists between establishment scale and local industry concentration using a large cross‐sectional plant‐level data set for the United States. Using an exhaustive plant‐level panel data set for Irish manufacturing covering nearly three decades, we are able to extend their analysis in two ways. First, we show that failing to control for fixed effects biases the relationship upward, although the essence of the result still remains after fixed effects are included. Second, the link is substantially weaker when plants locate for the first time in an area, but strengthens with age for those that survive in the long run. We link our results to recent contributions on the dynamics of geographic concentration.     

The first discovery of Neolithic rice remains in eastern Taiwan: phytolith evidence from the Chaolaiqiao site

Located in the key junction between mainland China and Island Southeast Asia, Taiwan is of great significance for our understanding of the southeastward dispersal of rice agriculture in the prehistoric period. Until now, quite limited archaeobotanical work has been done in this region. In eastern Taiwan, no archaeological evidence of rice agriculture has been obtained, probably owing to the poor preservation conditions for plant macroremains. Here, we report a new discovery of 4200-year-old domesticated rice remains at the Chaolaiqiao site, which for the first time in detail demonstrates the ancient practice of rice agriculture in this area. Based on a combination of factors that include a rice-based plant subsistence strategy, the mid-Holocene limits to available farmland and the fast-growing Taiwan Neolithic population from settlement pattern data, we infer that this contradiction in eastern Taiwan between land-dependent agriculture and limited suitable farmland encouraged a population movement out of Taiwan during the Middle Neolithic period.     

Approaches to Interpreting Mesolithic Mobility and Settlement in Britain and Ireland

The Mesolithic communities of northwest Europe have generally been considered inherently mobile, and all the material evidence associated with them has been interpreted accordingly. This has resulted in entrenched, theoretically polemical and largely hypothetical mobility models, focusing on seasonal rounds and extraction activities. However, recent reanalyses of the ethnographic sources, and discoveries of both substantial and ephemeral Mesolithic structures, as well as new data from recent innovative lithic and scientific analyses (including DNA, isotope research on human remains, and geochemical analyses of lithic artefacts), have forced us to rethink the rather static models of Mesolithic mobility strategies. This paper, examining Mesolithic hunter-gatherer mobility and settlement models from Britain and Ireland, is part of that reassessment. In particular, it assesses the impact of the multiple lines of consilience on our understanding of Mesolithic habitation of landscapes. These include the archaeological evidence and the efficacy of recent theoretical and methodological approaches that have been employed to interpret it.     

An integrated assessment of archaeobotanical recovery methods in the Neotropical rainforest of northern Belize: flotation and dry screening

This report presents results of a study examining the ancient use of plants at four Late Classic (CE 600-900) Maya rural farmsteads in northwestern Belize. Our research specifically targeted residential middens for macrobotanical recovery. Samples yielded the remains of more than a dozen plant families, representing some genera that do not currently grow in the area. These plants were used in the Late Classic, countering the idea that ancient botanical remains do not survive in Neotropical archaeological contexts. We also evaluated two macrobotanical sample processing methods vis-à-vis one another: flotation and dry screening. Our results indicate that flotation recovered 58% more seeds than dry screening, while dry screening yielded almost twice as much charcoal and other wood as flotation. The divergent quantities in the types of material recovered suggest a comprehensive macrobotanical recovery program should include the use of both processing methods.     

Envisioning Future Landscapes in the Environmentally Sensitive Areas of Scotland

Environmentally Sensitive Areas (ESAs) designated under EC Structure Regulation 797/85 now cover 1.4 million ha of the Scottish countryside and are likely to make a substantial contribution to the regulation of landscape change. Visual changes to landscapes with (policy on) and without (policy off) the ESA programme in two Scottish ESA areas, Breadalbane and the Machair, are predicted through impact-assessment procedures and computer manipulation of photographic images. The methodological requirements for such predictions are outlined and substantial differences in landscape characteristics under policy on/off scenarios are revealed. Such approaches to landscape change are an essential foundation for the development of environmental cost-benefit analyses and will contribute to public consultation processes.     

Teotihuacan pottery as evidence for subsistence practices involving maguey sap

As in most other pre-industrial cities, urban life at Teotihuacan was closely intertwined with ceramic technology, perhaps nowhere more so than in the realm of foodways. Here, we use two kinds of information derived from ancient pottery—ceramic residues and intra-site sherd distribution patterns—to shed new light on the city’s subsistence economy. We concentrate in particular on the amphora, a type of vessel that may have been used to contain aguamiel and pulque, liquid foodstuffs made of maguey sap. Distributional data distilled from surface collections of the Teotihuacan Mapping Project are informative about patterned variation in the use of these pots at the scale of the entire city. More focused analyses are aimed at chemical characterization of organic residues preserved in ceramic sherds recovered from recent excavations. Part of a broader project aimed at identifying both animal and plant remains, the results of the residue analysis provide the first direct identification of pulque remains in Teotihuacan pottery.     

Tracing Process to Performance of Collaborative Governance: A Comparative Case Study of Federal Hydropower Licensing

Despite collaborative governance's popularity, whether collaboration improves policy performance remains uncertain. This study assesses the link between collaborative decision making and licensed environmental management protocols in the Federal Energy Regulatory Commission's (FERC's) process for licensing hydropower facilities in the United States. Using results from a previous study of FERC relicensing (Ulibarri, forthcoming), one high‐, one medium‐, and one low‐collaboration case were selected. Using documents including meeting minutes, public comments, and issued licenses, I assessed collaboration and license outputs, then conducted process tracing to examine whether and how differences in collaboration produced differences in license quality. High collaboration resulted in jointly developed and highly implementable operating regimes designed to improve numerous resources, while low collaboration resulted in operating requirements that ignored environmental concerns raised by stakeholders and lacked implementation provisions. These results support the hypothesis that collaboration can improve environmental outcomes, revealing the pragmatic value of collaboration. [Correction added on 13 January 2015, after first online publication: the occurrences of ‘0’ in the abstract were erroneous and have now been corrected.]     

内蒙赤峰巴彦塔拉辽代遗址浮选结果及分析

伴随巴彦塔拉辽代遗址的发掘过程进行了植物浮选工作,获得了包括粟、黍、大麦、荞麦、大麻等农作物籽粒,以及禾本科、藜科、豆科、锦葵科等植物种子。通过植物遗存的分类与鉴定及遗址出土相关考古资料综合分析,该遗址辽代先民的生业经济应属于以种植粟、黍、荞麦、大麻为主的北方典型旱作农业,同时兼营牧业。     

Exploring Roman Ritual Behaviours Through Plant Remains from Pannonia Inferior

The recovery of new plant remains from eastern Croatia are discussed here in order to determine their ritual significance and how this evidence may fit into chronological and regional observations on ritual plant offerings in the Roman world. Samples collected from inhumations, cremations and an altar dedicated to Silvanus Domesticus, dating from the 2nd to 4th centuries AD, are presented and show that a range of more ‘common’ plant remains, such as cereals and pulses, were an important part of ritual life. These results are also compared to the growing archaeobotanical data collected from shrine and cremation burials across Europe. Although the archaeobotanical data from the Croatian sites are limited, the increasing evidence of ritual plant use allows observations regarding the wider context of Roman social and religious change.